diff --git a/src/applications/differential/query/DifferentialRevisionSearchEngine.php b/src/applications/differential/query/DifferentialRevisionSearchEngine.php
index 8263b91dbb..5cf6f82198 100644
--- a/src/applications/differential/query/DifferentialRevisionSearchEngine.php
+++ b/src/applications/differential/query/DifferentialRevisionSearchEngine.php
@@ -1,226 +1,281 @@
 <?php
 
 final class DifferentialRevisionSearchEngine
   extends PhabricatorApplicationSearchEngine {
 
   public function getResultTypeDescription() {
     return pht('Differential Revisions');
   }
 
   public function getApplicationClassName() {
     return 'PhabricatorDifferentialApplication';
   }
 
   protected function newResultBuckets() {
     return DifferentialRevisionResultBucket::getAllResultBuckets();
   }
 
   public function newQuery() {
     return id(new DifferentialRevisionQuery())
       ->needFlags(true)
       ->needDrafts(true)
       ->needRelationships(true)
       ->needReviewerStatus(true);
   }
 
   protected function buildQueryFromParameters(array $map) {
     $query = $this->newQuery();
 
     if ($map['responsiblePHIDs']) {
       $query->withResponsibleUsers($map['responsiblePHIDs']);
     }
 
     if ($map['authorPHIDs']) {
       $query->withAuthors($map['authorPHIDs']);
     }
 
     if ($map['reviewerPHIDs']) {
       $query->withReviewers($map['reviewerPHIDs']);
     }
 
     if ($map['repositoryPHIDs']) {
       $query->withRepositoryPHIDs($map['repositoryPHIDs']);
     }
 
     if ($map['status']) {
       $query->withStatus($map['status']);
     }
 
     return $query;
   }
 
   protected function buildCustomSearchFields() {
     return array(
       id(new PhabricatorSearchDatasourceField())
         ->setLabel(pht('Responsible Users'))
         ->setKey('responsiblePHIDs')
         ->setAliases(array('responsiblePHID', 'responsibles', 'responsible'))
         ->setDatasource(new DifferentialResponsibleDatasource())
         ->setDescription(
           pht('Find revisions that a given user is responsible for.')),
       id(new PhabricatorUsersSearchField())
         ->setLabel(pht('Authors'))
         ->setKey('authorPHIDs')
         ->setAliases(array('author', 'authors', 'authorPHID'))
         ->setDescription(
           pht('Find revisions with specific authors.')),
       id(new PhabricatorSearchDatasourceField())
         ->setLabel(pht('Reviewers'))
         ->setKey('reviewerPHIDs')
         ->setAliases(array('reviewer', 'reviewers', 'reviewerPHID'))
         ->setDatasource(new DiffusionAuditorFunctionDatasource())
         ->setDescription(
           pht('Find revisions with specific reviewers.')),
       id(new PhabricatorSearchDatasourceField())
         ->setLabel(pht('Repositories'))
         ->setKey('repositoryPHIDs')
         ->setAliases(array('repository', 'repositories', 'repositoryPHID'))
         ->setDatasource(new DiffusionRepositoryDatasource())
         ->setDescription(
           pht('Find revisions from specific repositories.')),
       id(new PhabricatorSearchSelectField())
         ->setLabel(pht('Status'))
         ->setKey('status')
         ->setOptions($this->getStatusOptions())
         ->setDescription(
           pht('Find revisions with particular statuses.')),
     );
   }
 
   protected function getURI($path) {
     return '/differential/'.$path;
   }
 
   protected function getBuiltinQueryNames() {
     $names = array();
 
     if ($this->requireViewer()->isLoggedIn()) {
       $names['active'] = pht('Active Revisions');
       $names['authored'] = pht('Authored');
     }
 
     $names['all'] = pht('All Revisions');
 
     return $names;
   }
 
   public function buildSavedQueryFromBuiltin($query_key) {
     $query = $this->newSavedQuery();
     $query->setQueryKey($query_key);
 
     $viewer = $this->requireViewer();
 
     switch ($query_key) {
       case 'active':
         $bucket_key = DifferentialRevisionRequiredActionResultBucket::BUCKETKEY;
 
         return $query
           ->setParameter('responsiblePHIDs', array($viewer->getPHID()))
           ->setParameter('status', DifferentialRevisionQuery::STATUS_OPEN)
           ->setParameter('bucket', $bucket_key);
       case 'authored':
         return $query
           ->setParameter('authorPHIDs', array($viewer->getPHID()));
       case 'all':
         return $query;
     }
 
     return parent::buildSavedQueryFromBuiltin($query_key);
   }
 
   private function getStatusOptions() {
     return array(
       DifferentialRevisionQuery::STATUS_ANY            => pht('All'),
       DifferentialRevisionQuery::STATUS_OPEN           => pht('Open'),
       DifferentialRevisionQuery::STATUS_ACCEPTED       => pht('Accepted'),
       DifferentialRevisionQuery::STATUS_NEEDS_REVIEW   => pht('Needs Review'),
       DifferentialRevisionQuery::STATUS_NEEDS_REVISION => pht('Needs Revision'),
       DifferentialRevisionQuery::STATUS_CLOSED         => pht('Closed'),
       DifferentialRevisionQuery::STATUS_ABANDONED      => pht('Abandoned'),
     );
   }
 
   protected function renderResultList(
     array $revisions,
     PhabricatorSavedQuery $query,
     array $handles) {
     assert_instances_of($revisions, 'DifferentialRevision');
 
     $viewer = $this->requireViewer();
     $template = id(new DifferentialRevisionListView())
       ->setUser($viewer)
       ->setNoBox($this->isPanelContext());
 
     $bucket = $this->getResultBucket($query);
 
+    $unlanded = $this->loadUnlandedDependencies($revisions);
+
     $views = array();
     if ($bucket) {
       $bucket->setViewer($viewer);
 
       try {
         $groups = $bucket->newResultGroups($query, $revisions);
 
         foreach ($groups as $group) {
           $views[] = id(clone $template)
             ->setHeader($group->getName())
             ->setNoDataString($group->getNoDataString())
             ->setRevisions($group->getObjects());
         }
       } catch (Exception $ex) {
         $this->addError($ex->getMessage());
       }
     } else {
       $views[] = id(clone $template)
         ->setRevisions($revisions)
         ->setHandles(array());
     }
 
     $phids = array_mergev(mpull($views, 'getRequiredHandlePHIDs'));
     if ($phids) {
       $handles = id(new PhabricatorHandleQuery())
         ->setViewer($viewer)
         ->withPHIDs($phids)
         ->execute();
     } else {
       $handles = array();
     }
 
     foreach ($views as $view) {
       $view->setHandles($handles);
+      $view->setUnlandedDependencies($unlanded);
     }
 
     if (count($views) == 1) {
       // Reduce this to a PHUIObjectItemListView so we can get the free
       // support from ApplicationSearch.
       $list = head($views)->render();
     } else {
       $list = $views;
     }
 
     $result = new PhabricatorApplicationSearchResultView();
     $result->setContent($list);
 
     return $result;
   }
 
   protected function getNewUserBody() {
     $create_button = id(new PHUIButtonView())
       ->setTag('a')
       ->setText(pht('Create a Diff'))
       ->setHref('/differential/diff/create/')
       ->setColor(PHUIButtonView::GREEN);
 
     $icon = $this->getApplication()->getIcon();
     $app_name =  $this->getApplication()->getName();
     $view = id(new PHUIBigInfoView())
       ->setIcon($icon)
       ->setTitle(pht('Welcome to %s', $app_name))
       ->setDescription(
         pht('Pre-commit code review. Revisions that are waiting on your input '.
             'will appear here.'))
       ->addAction($create_button);
 
       return $view;
   }
 
+  private function loadUnlandedDependencies(array $revisions) {
+    $status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;
+
+    $phids = array();
+    foreach ($revisions as $revision) {
+      if ($revision->getStatus() != $status_accepted) {
+        continue;
+      }
+
+      $phids[] = $revision->getPHID();
+    }
+
+    if (!$phids) {
+      return array();
+    }
+
+    $query = id(new PhabricatorEdgeQuery())
+      ->withSourcePHIDs($phids)
+      ->withEdgeTypes(
+        array(
+          DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST,
+        ));
+
+    $query->execute();
+
+    $revision_phids = $query->getDestinationPHIDs();
+    if (!$revision_phids) {
+      return array();
+    }
+
+    $viewer = $this->requireViewer();
+
+    $blocking_revisions = id(new DifferentialRevisionQuery())
+      ->setViewer($viewer)
+      ->withPHIDs($revision_phids)
+      ->withStatus(DifferentialRevisionQuery::STATUS_OPEN)
+      ->execute();
+    $blocking_revisions = mpull($blocking_revisions, null, 'getPHID');
+
+    $result = array();
+    foreach ($revisions as $revision) {
+      $revision_phid = $revision->getPHID();
+      $blocking_phids = $query->getDestinationPHIDs(array($revision_phid));
+      $blocking = array_select_keys($blocking_revisions, $blocking_phids);
+      if ($blocking) {
+        $result[$revision_phid] = $blocking;
+      }
+    }
+
+    return $result;
+  }
+
 }
diff --git a/src/applications/differential/view/DifferentialRevisionListView.php b/src/applications/differential/view/DifferentialRevisionListView.php
index 826536355e..6451bd9d2a 100644
--- a/src/applications/differential/view/DifferentialRevisionListView.php
+++ b/src/applications/differential/view/DifferentialRevisionListView.php
@@ -1,185 +1,205 @@
 <?php
 
 /**
  * Render a table of Differential revisions.
  */
 final class DifferentialRevisionListView extends AphrontView {
 
   private $revisions;
   private $handles;
   private $highlightAge;
   private $header;
   private $noDataString;
   private $noBox;
   private $background = null;
+  private $unlandedDependencies = array();
+
+  public function setUnlandedDependencies(array $unlanded_dependencies) {
+    $this->unlandedDependencies = $unlanded_dependencies;
+    return $this;
+  }
+
+  public function getUnlandedDependencies() {
+    return $this->unlandedDependencies;
+  }
 
   public function setNoDataString($no_data_string) {
     $this->noDataString = $no_data_string;
     return $this;
   }
 
   public function setHeader($header) {
     $this->header = $header;
     return $this;
   }
 
   public function setRevisions(array $revisions) {
     assert_instances_of($revisions, 'DifferentialRevision');
     $this->revisions = $revisions;
     return $this;
   }
 
   public function setHighlightAge($bool) {
     $this->highlightAge = $bool;
     return $this;
   }
 
   public function setNoBox($box) {
     $this->noBox = $box;
     return $this;
   }
 
   public function setBackground($background) {
     $this->background = $background;
     return $this;
   }
 
   public function getRequiredHandlePHIDs() {
     $phids = array();
     foreach ($this->revisions as $revision) {
       $phids[] = array($revision->getAuthorPHID());
 
       // TODO: Switch to getReviewerStatus(), but not all callers pass us
       // revisions with this data loaded.
       $phids[] = $revision->getReviewers();
     }
     return array_mergev($phids);
   }
 
   public function setHandles(array $handles) {
     assert_instances_of($handles, 'PhabricatorObjectHandle');
     $this->handles = $handles;
     return $this;
   }
 
   public function render() {
     $viewer = $this->getViewer();
 
     $this->initBehavior('phabricator-tooltips', array());
     $this->requireResource('aphront-tooltip-css');
 
     $list = new PHUIObjectItemListView();
 
     foreach ($this->revisions as $revision) {
       $item = id(new PHUIObjectItemView())
         ->setUser($viewer);
 
       $icons = array();
 
       $phid = $revision->getPHID();
       $flag = $revision->getFlag($viewer);
       if ($flag) {
         $flag_class = PhabricatorFlagColor::getCSSClass($flag->getColor());
         $icons['flag'] = phutil_tag(
           'div',
           array(
             'class' => 'phabricator-flag-icon '.$flag_class,
           ),
           '');
       }
 
       if ($revision->getDrafts($viewer)) {
         $icons['draft'] = true;
       }
 
       $modified = $revision->getDateModified();
 
       $status = $revision->getStatus();
       $status_name =
         ArcanistDifferentialRevisionStatus::getNameForRevisionStatus($status);
 
       if (isset($icons['flag'])) {
         $item->addHeadIcon($icons['flag']);
       }
 
       $item->setObjectName('D'.$revision->getID());
       $item->setHeader($revision->getTitle());
       $item->setHref('/D'.$revision->getID());
 
       if (isset($icons['draft'])) {
         $draft = id(new PHUIIconView())
           ->setIcon('fa-comment yellow')
           ->addSigil('has-tooltip')
           ->setMetadata(
             array(
               'tip' => pht('Unsubmitted Comments'),
             ));
         $item->addAttribute($draft);
       }
 
       // Author
       $author_handle = $this->handles[$revision->getAuthorPHID()];
       $item->addByline(pht('Author: %s', $author_handle->renderLink()));
 
+      $unlanded = idx($this->unlandedDependencies, $phid);
+      if ($unlanded) {
+        $item->addAttribute(
+          array(
+            id(new PHUIIconView())->setIcon('fa-chain-broken', 'red'),
+            ' ',
+            pht('Open Dependencies'),
+          ));
+      }
+
       $reviewers = array();
       // TODO: As above, this should be based on `getReviewerStatus()`.
       foreach ($revision->getReviewers() as $reviewer) {
         $reviewers[] = $this->handles[$reviewer]->renderLink();
       }
       if (!$reviewers) {
         $reviewers = phutil_tag('em', array(), pht('None'));
       } else {
         $reviewers = phutil_implode_html(', ', $reviewers);
       }
 
       $item->addAttribute(pht('Reviewers: %s', $reviewers));
       $item->setEpoch($revision->getDateModified());
 
       switch ($status) {
         case ArcanistDifferentialRevisionStatus::NEEDS_REVIEW:
           $item->setStatusIcon('fa-code grey', pht('Needs Review'));
           break;
         case ArcanistDifferentialRevisionStatus::NEEDS_REVISION:
           $item->setStatusIcon('fa-refresh red', pht('Needs Revision'));
           break;
         case ArcanistDifferentialRevisionStatus::CHANGES_PLANNED:
           $item->setStatusIcon('fa-headphones red', pht('Changes Planned'));
           break;
         case ArcanistDifferentialRevisionStatus::ACCEPTED:
           $item->setStatusIcon('fa-check green', pht('Accepted'));
           break;
         case ArcanistDifferentialRevisionStatus::CLOSED:
           $item->setDisabled(true);
           $item->setStatusIcon('fa-check-square-o black', pht('Closed'));
           break;
         case ArcanistDifferentialRevisionStatus::ABANDONED:
           $item->setDisabled(true);
           $item->setStatusIcon('fa-plane black', pht('Abandoned'));
           break;
       }
 
       $list->addItem($item);
     }
 
     $list->setNoDataString($this->noDataString);
 
 
     if ($this->header && !$this->noBox) {
       $list->setFlush(true);
       $list = id(new PHUIObjectBoxView())
         ->setBackground($this->background)
         ->setObjectList($list);
 
       if ($this->header instanceof PHUIHeaderView) {
         $list->setHeader($this->header);
       } else {
         $list->setHeaderText($this->header);
       }
     } else {
       $list->setHeader($this->header);
     }
 
     return $list;
   }
 
 }